Nailing-machine



W. N. OEHM AND G. POWELL.

NAILING MACHINE. APPLICATION FILED DEC. 2, 1920.

1,393,816. v Patented Oct. 18,1921,

2 SHEETS-SHEET l- M 2:"; L1 L20 15 21 1 ffly ene onsx I I ffi'ZZaM/KOe/zm W. N. OEHM AND G. POWELL.

NAILING MACHINE. APPLICATION FILED DEC. 2' 1920.

1,393,816. Patented Oct. 18, 1921.

' 2 SHEETSSHEET 2- UNITED STATES PATENT OFFICE WILLIAM N. OEHM AND GOMERT POWELL, OF MICHIGAN CITY, INDIANA.

NAILING-MACI-IINE.

To all whom it may concern:

Be it knownthat we, WILLIAM N. OEHVM and GoMnRr POWELL, citizens of theUnited States and Holland, respectively, and residents of Michigan'City, county. of Laporte, and State of Indiana, have jointly invented certain new and useful Improvements in N ailing-Machines, ofwhich the following is a specification and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to a nailing machine includinga pneumatic hammer and adapted especially for driving the nails in floor boards, particularly-the flooring of cars.

The objects of the invention are to provide for the ready shifting of the machine and permanently positioning it fordriving a nail; to provide a simple and efiicient nailfeeding evice,and to secure rapidity of operation.

Anembodiment of the invention is illustrated in the accompanying drawings, in which r a Figure 1 is a longitudinal section of the machine, partly in elevation, on the line 1 1 of Fig. 2;

Fig. 2 is a side elevation of the machine;

Fig. 3 is a plan section on the line 3-3 of Fig. 1;

Fig. 4 is a sectional view on the line 4-4 of Fig. 3;

Fig. 5 is a detail section on the line 5--5 of Fig. 3; and

Fig. 6 is a detail section on the line 66 of Fig. 4.

The machine comprises a pneumatic hammer, conventionally shown at 10, and which may be of any desired construction having the usual handle 11 and controlling valve 12. This hammer telescopically enters a tube 13, the lower end 14 of which is con tracted to form a nipple and positioned in this nipple is a bushing provided with spurs 15 which will engage the board into which the nail is to be driven and hold the machine in proper position.

A pedal 16, adapted to have its outer end loosely rest upon the floor, is connected by means of links 17, 18, to a pair of pull rods 19, 20, attached to the upper end of the hammer casing, and a spring 21, coiled about one of the rods, as 19, and reacting between the upper end thereof and a guide bracket 22 attached to the tube 13, normally the hammer in elevated position.

7 Application filed December 2, 1920. Serial No.

' is positioned for Patented Oct. 18, 1921.

A feed tube 23 enters the tube 13 laterally for delivering nails" thereto, and which are fed through the feed tube from a suitable receptacle, such as a. funnel 24, connected therewith by means of a tube 25. The size of the tube 25 is such that the; nails pass through singly, and as each naildescends it is arrested .at the upper end of the tube 23 by a pivoted dog26' projecting into its path a'suflicient distance to certainly engage its head. This dog is held in nail-engaging position by means of a spring 27.

A trip arm 28 is pivoted at 29 to an arm 30 secured to the pivot of the dog 26, and projects into the path of a trip 31 carried by one of the pull rods, as 20. As the hammer is moved upwardly by the action of'the spring 21the trip 31 engages below the arm 28 and turns the dog 26, releasing the nail X and permitting itto drop into the tube 13. As the hammer is drawn down the trip 31 passes the trip arm 28, turning it on its pivot, and this latter arm is immediately returned to its normal position by the actionof aspring32. p

Within the lower contracted end 14 of the tube 13 there is slidingly fitted a bushing 33, the bore of which is suitable to allow the passage of a nail therethrough while holding it in upright position. The downward movement of the bushing 33 is limited by a screw stud 34, projecting through a longitudinal slot in the tube section 14. As the machine the drivin of a nail the bushing 33 is moved upwar ly a short distance by its engagement with the floor and insures the entry thereinto of the nail now within the body portion of the tube 13.

A punch or nail set 35, forming an element of the pneumatic hammer, is positioned to bear uponthe nail when the latter occupies the bushing 33, and to drive it as the hammer is operated. The nail set 35 has a limited longitudinal movement within the lower end of the barrel of the hammer to permit the latter to be advanced after each blow is struck.

The operation of the device, as will be understood from the foregoing description, is as follows Assuming that the feed tube 25 is filled with spikes, and that one has been driven, the machine rests on the spot, the operator standing with one foot on the pedal 16 and the other on the floor. He now takes a step inward, pin one t 9. the P a d then lifts the machine to the new position, at the same time releasing slightly the pres- 7 sure on the pedal so as to'permit the springs 21, 21, to raise the hammer and thus release a spike, which drops obliquely into the tube 13. During the forward movement s the spike so that it isfready to be driven into the fioon.

"the tube 13 onthe upward movement 0 The operator now presses the lever of the air controlling valve 12 with his thumb, and at the same time steps on the pedal 16, thus lowering the hammer and pressing the set into contact with the spike. The set. is allowed a small amount of playv within the hammer barrel because of the recess 36, and the head of the spike may therefore be driven bythe air pressure slightlybelowfthe level' of the floor without injury to the hammer.'- i

The pressure on thepedal is released, and another spike is automatically droppedfinfio t e hammer. Thef'operator, again moves'the machine to a position slightly in advance of the last one and then drops the machine in place, keeping "his'foot always on the pedal 16. It is found that by thefuse'of this ma chine very rapid nailing can be accomplished, and it isof particular value in nail- V n p the free" end of the hinged pedal is permitted to drag 1 along the floor. At the new position the ing the flooring of cars, where heavy spikes are used and rapid operation is essential. The 'device is a unitary structure, all of whose parts combine in rendering the Whole efficient.

We claim as our invention- 1 '1. "In anailing machine, in combination, a nail-positioning nipple, a bushing slidable within the nipple'and so constructed as to straighten the nail. V y

2.,In a nail box, in combination, a nailpositioning nipple, and a bushing longitudinally slidable therein. v

3311 a nailing machine, "in combination, a nail-receiving chamber, nail-feeding means opening obliquely into said chamber at one side thereof, a nail-positioning nipple otless diameter than the chamber locatedbelow the same, i and a longi udinally slidable'bush ing within thenipple, I I a 4:, A nail box comprising, incombination,

a nail-receiving chamber tapered at itslower end, a nail-positioning nipple of less'diameterthan the receiving chamber located below the same, and a longitudinally slidable bushing within the nipplehavi-ng its upper, end

internally tapered to correspond to the taper,

of the receiving chamber. g

5'; Ina nailing machine,inlcombination, a nail box, a nipple leading from the bottom of the, box, and a slidable. bushingfwithin the nipple and norma 1y projecting beyond its outer'end. V V

" a WILLIAM N. OEH'M;

, I G M RT OWELL. 

